How to Choose a Magnetic Speed Sensor
Choosing a Passive Magnetic Speed Sensor
Here are the steps to choose the correct magnetic speed sensor for your application:
(1) Choose either Passive or Active (Hall Effect) type Magnetic Speed Sensor - this depends on the application If the top RPM is under 100 RPM then use a Hall Effect Sensor as this sensor's output is independent of sensing gear speed or shaft rotation speed.
(2) Check the input voltage requirements of the instrument or module that will receive the electrical pulse signal from the sensor. The electrical signal at the receiving instrument must be greater than the minimum +1 logic state. When the voltage pulse exceeds the +1 logic state, the instrument (tachometer) will count the pulse. Choose a magnetic speed sensor that has the correct output voltage for your receiving instrument or tachometer.
(3) Choose Thread Size and Length
(4) Choose the classification - do you need FM or UL approval for hazardous areas?
(5 Choose the application - General Purpose, High Sensitivity, Power -
(6) Pick the type of connector.
(7) Choose the Mounting Bracket and Sensing Gear ( if required)
(8) Choose the Tachometer (Note - all AI-Tek Process Tachometers feature the correct input voltage specifications for all passive and Hall Effect magnetic speed sensors.
(9) Need Assistance? Call Pierre Grimes - Engineering Consultant - 248-388-2543
Click here for Principles of Operation
Speed Sensor Applications
AI-Tek Speed Sensors are used in a variety of applications.
AI-Tek Passive speed sensors convert mechanical motion to an AC voltage without the need of a power supply. These self-contained magnetic speed sensors produce a magnetic field which, when in the proximity of a ferrous object in motion, generate a voltage. The fequency of this voltage is directly porportional to the speed of the object in motion.
AI-Tek Hall Effect Speed Sensors are available in uni-directional and bi-directional models and utilize integral active signal conditioning electronics to provide constant amplitude output regardless of exciter speed. These speed sensors can be powered with a wide range of supply voltages and are compatible with digital equipment. These units are ideal for zero speed and very low speed applications.
Rail Car and Locomotive Traction
Aircraft gas turbine engines
Power Generating Stations
Off Road Vehicle Power take off
Vehicle Transmission Speed Control
No-drag Flow Meters (turbine meters)
Under/Over Speed Control
Waster Water lift pump
Process Control of mixers and pumps
Stamping Machine Control